yesterday, he greeted egypt's prime minister here. today, the tunisian foreign minister's delegation could only look at the rubble. witnesses say the prime minister's office was hit by at least four israeli air strikes. this was the symbol of hamas's authority in the gaza strip. now hamas's top leaders have gone into hiding. so israel is hunting them down in their homes. israel flattened this apartment building where a hamas police official was living. amazingly, the 35 residents inside escaped as the building pancaked. but next door, a middle schoolteacher who says he isn't involved with hamas, told me his five children are now in the hospital. >> translator: the israelis aren't being precise. i didn't launch any rockets at tel aviv. there is no excuse. >> reporter: residents salvaged what they could. so did this 4-year-old. these are childhood memories she's unlike tloi forget. in most of gaza, the streets are closed. men steeled their nerves, watching nonstop hamas videos now on tv that praise the militants. gazans know they can ex